﻿using System;
using System.Globalization;
using System.Windows.Data;

namespace BioWF.ExpressionEditor
{
    /// <summary>
    /// Type converter to take an intellisense entry type and turn it into an image.
    /// </summary>
    public sealed class TypeImageConverter : IValueConverter
    {
        /// <summary>
        /// Converts a value. 
        /// </summary>
        /// <returns>
        /// A converted value. If the method returns null, the valid null value is used.
        /// </returns>
        /// <param name="value">The value produced by the binding source.</param><param name="targetType">The type of the binding target property.</param><param name="parameter">The converter parameter to use.</param><param name="culture">The culture to use in the converter.</param>
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            string image = (value ?? "primitive").ToString().ToLower();
            return image != "primitive"
                ? "/BioWF.Gui;component/ExpressionEditor/Images/" + image + ".png"
                : null;
        }

        /// <summary>
        /// Converts a value. 
        /// </summary>
        /// <returns>
        /// A converted value. If the method returns null, the valid null value is used.
        /// </returns>
        /// <param name="value">The value that is produced by the binding target.</param><param name="targetType">The type to convert to.</param><param name="parameter">The converter parameter to use.</param><param name="culture">The culture to use in the converter.</param>
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotSupportedException();
        }
    }
}
